| Rank | Abbreviation | Meaning |
|---|
| ***** | PGSA | Peter Garnham Security Associates
| |
| **** | PGSA | Poly Glycerol-co Sebacic Acid
| |
| **** | PGSA | Petaluma Girls Softball Association
| |
| *** | PGSA | Polish Genealogical Society of America
| |
| *** | PGSA | Producción de Gas de Síntesis del Amoníaco
| |
| ** | PGSA | Professional Gamers Association
| |
| ** | PGSA | Polish Genealogy Society of America
| |
| ** | PGSA | Pharmacy Graduate Student's Association
| |
| ** | PGSA | Prince George Squash Association
| |
| ** | PGSA | Physics Graduate Student Association
| |
| ** | PGSA | Power Generating Shock Absorber
| |
| * | PGSA | Programa General de Simplificación Administrativa
| |
| * | PGSA | Pennsylvania Governor's School for the Arts
| |
| * | PGSA | Pleasanton Girls Soccer Association
| |
| * | PGSA | Pointe Girls Soccer Association
| |
| * | PGSA | Pre-Professional & Graduate School Advising
| |
| * | PGSA | Post Graduate Study Award
| |
| * | PGSA | Professional Gastroenterology & Surgery Associates
| |
| * | PGSA | Phosphatidylglycerophosphate Synthase
| |
| * | PGSA | Preliminary Gas Sales Agreement
| |
| * | PGSA | Pharmacology Graduate Students Association
| |
| * | PGSA | Post Graduate Student Association
| |
| * | PGSA | Postgraduate Students' Association
| |
| * | PGSA | Psychology Graduate Student Association
| |
| * | PGSA | Philosophy Graduate Student Association
| |